Tic Tac Toe

How to play Tic Tac Toe

1. You are X, the computer is O. Take turns placing your mark on the 3 x 3 grid.
2. Line up three marks in a row, a column or a diagonal to win the round.
3. A match is won with 3 rounds, within 5 rounds at most.
4. On Hard the computer never loses: get through 5 rounds without losing one to win the match.
5. Choose 2 players to play with a friend on the same screen.

Tips

• Take the center when you can: it belongs to four lines.
• Corners are stronger than edges: they belong to three lines.
• Create two threats at once (a fork): the opponent can only block one.
• Always block a line of two before building your own.
• On Easy and Medium, and with two players, Undo takes back your last move along with the computer's answer. On Hard, every move counts.

About Tic Tac Toe

Tic Tac Toe is one of the oldest games on paper, and a perfect first lesson in strategy: with best play on both sides, every game is a draw.

The computer uses the minimax method, which explores every possible ending. On Easy and Medium it makes deliberate mistakes; on Hard it plays perfectly, so the challenge becomes never to lose.

Points and badges

Finishing a game of Tic Tac Toe earns points for your level. Four badges are waiting in this game, from bronze to diamond: each one says what to do and adds bonus points.

Questions